needs ome help with this lens design

[alex from holland]

I recentley acquired aan old colldodion camera.
There is a lens on it with a strage glass design in it.
It only has 2 glass parts which are also rathr thin.
The lens and the glas is in perfect condiction.
The original laquer looks like new
there are no signs that the glass has been exchanged with something else.
Even the inside of the lens is in beautifull shape


size is about 7 1/2 inch tall and 4 inch wide ( at hood)
focal lenght is about 13 inch.
It produces a fine picture.
Has anyone seen this before ?
Ever our specialist Dan hasen't seen this before.

Alex

[Steven Tribe]

Another post Darlot Puyo maker?

Basically a periscope design. Plano-convex or concavo-convex?

[alex from holland]

Hello Steven,

it is convaco convex ( learned something new today )

Alex

[alex from holland]

Steven,

Thanks !
I checked some other pictures and indeed it looks very very close to a Darlot.
Now we have to solve the "odd" glass design ??

Alex

[Steven Tribe]

The "odd" glass design is standard P&P - "Objectif d' Artiste". Which I already suggested, actually.

This supports my theory that when Darlot's succesors gave up the P&P offerings - they got rid of the stock of barrels wholesale.

Concavo - sorry!!

There is a text in VM (search for anachromatique) which describes how the version with 2 concavo-convex lenses should be mounted correctly!

[goamules]

Yeah, I don't know about the glass elements, but the barrel looks very Darlot. Black knurled front element holder, knob, and squared off edge where the threads start.

[Steven Tribe]

Does anyone agree with me about this?

[alex from holland]

Steven,

where can i find this :
There is a text in VM (search for anachromatique) ??
What is VM (Sorry, but i really don't know.....)

[Steven Tribe]

Vade Mecum (for photographic lenses). Available, for a small fee, through CCHarrison here.
antiquecameras.net/lensvademecum

[Mark Sawyer]

Puyo, Pulligny, or Periscope, probably pronounced with a P.

Such a simple design, two positive meniscus lenses. Could be a number of things. A plethora of possibilities...